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The Many Uses of Crystal Oscillators That You Must Know
There are a lot of things that you need to know about crystal oscillators. The first thing you should know about it is that it is one kind of electronic circuit where at a specific frequency, will be able to produce electrical oscillations. From the circuit feedback loop, there you will find one or more than one crystals such as quartz where their physical characteristics influence the frequency.
When it comes to crystal oscillators, do know that they come with a number of uses. These circuits are often used for communication and electronic purposes. To put into perspective, they are widely used for any application that requires accurate coordination and time measurement. You can expect more stable time frequency generators all because of these circuits. Such generators will then be utilized in pilot and carrier signals that will be great for use among navigation and electronic communication systems. The clock signals that will be used in any data processing equipment can also benefit from these crystal oscillators. Having reference signals is what you can expect from these circuits as well that help in a wide variety of systems with their special purposes. The required stability and accuracy of the output frequency of these crystal oscillators will depend on their purpose. 1000 PPM is the frequency range that usually begins with the clocks that only make use of simple microprocessors. On the other hand, about less than 5 PPM is required when it comes to applications that need to utilize very precise control of the frequency.
A feedback network and an amplifier are the two things that you can expect from crystal oscillators. This feedback network which it contains takes charge in selecting what output of the amplifier must be returned back to its input. The goings on of the oscillator circuit can be determined based on two key factors. The first one is where the gain loop should be having losses around the oscillator loop that is greater or can be equal to the unity. The phase shift of the loop being equal to 360 or 0 degrees is the second factor. Simply put, these angle shifts in loop phase is telling of the frequency by which these crystal oscillators must work. There will be a change in the oscillator circuit output frequency even with just minor changes happening on angle of the net loop phase. To reduce the instances of shifts in the net phase, the use of quartz crystal that must be positioned in the feedback loop is a must.
With crystals having stable temperature and high frequency stability characteristics and processing ability, there is no doubt that using crystal oscillators is very much beneficial. In addition, crystal oscillators are able to achieve a high degree of frequency stability as well as accuracy that you seldom see in other electronic circuits.